Fuel-retarding member for furnaces.



PATENTED NOV. 12, 1907.

G. 'L. JUDIGE.

FUEL RETARDING MEMBER FOR FURNACES. APPLICATION FILED JAN. 3'0, 1905.

2 SHEETS-SHEET 1 No. 870,968. PATENTED NOV. 12, 1907-.

FUEL RETARDING MEMBER FOR FURNACES. APPLICATION FILED JAN. 30, 1905.

2 SHEBTS-SHEBT 2.

UNITED STATES OFFICE.

GEORGE L. JUNGE, OF PITTSBURG, PENNSYLVANIA.

FUEL-RETARDING MEMBER FOR FURNACES.

Application tiled January 30.1905- To all whom it may concern:

Be it known that I, Gnoncs L. Jessa, a citizen of the United States, residing at the city of Pittsburg, in the county oi Allegheny and State 0i Pennsylvania, have invented or discovered new and useiul Improvements in Fuel ltetarding Members for Furnaces, 01' which the following is a specification.

In the accompanying drawings Figure l, is a longitudinal section along the line l--l in Fig. 2 showing a broken view of a furnace fire chamber fitted with my water back", Fig. 2 is a cross section oi the same along the line li--li in Fig. i; Fig. ti is an end view oi the iuel retarding in ember looking toward the leit in Fig. 2, and Fig.4 isasection oi the same along theline LV IV in Fig. 2; Fig. 5 is a side view oi the iorm ot' journal block which I build into the iurnace wall, a broken portion oi the wall being shown for the sake oi clearness, and Fig. t is an end view oi'tho same; Fig. 7 is an elevation, partly in section, showing a modilied arrangement oi the channels or passages in the iuel retarding member, and Figs. 8 and 9 are end views oi the adjacent ends oi the same; Fig. 10 is a view similar to Fig. 7 showing a inrthcr modification and Fig. ii is a view of the adjacent end oi the same; Fig. 12 is a similar view to Fig. l but along the line X11 X11 in Fig. iii, and Fig. 13 is a section along the line )llil--.\'ill in Fig. 12.

My invention, generally speaking, consists in a mem her or back intended to be located in the tire chamber of a lurnace adjacent to the rear of the grate or other incl platiorm and over the same. serving to retain or retard the unconsumed incl on the grate or platiorni until the same is thoroughly consumed. in its operative positionit is located sutliciently above the grate to permit the ashes to pass under the same down into the ash pit while the iuel is held back in the zone oi lire until entirely consumed. By this means coking the coal is averted and good combustion obtained. My int-l retarding member is provided with channels or passages then-through ior the passage oi water or other cooling medium to prevent the samrburning out under the intluence oi the intense heat oi the tire. i also provide means whereby the member 'may be raised irom its lowered position to prevent clinkers or other objects from blocking the same, to vary the distance between the grate and the member and ior the cleaning of the grate when desired.

The following is a detailed description oi my invention as shown in the accompanying drawings which are however merely illustrative oi an application oi the principles of the satire and thereiore not intended to limit the scopethereof 1- l is the tire chamber oi a furnace oi any character, oi which are shown the side walls 2'2.

3 is a chain grate oi any usual type or design. i show a chain grate tor the sake of illustration, as my :tuel retarding member is especially applicable to the Specification of Letters Patent.

Patented. Nov. 12, 1907.

Serial No. 243.237.

the same, but it will be understood that the use of my invention is notconiined to that form or any distinctive form of grate.

4 is the ash pit, 5 the bridge wall and G the iuel hopper irom which fuel is fed to the grate in the usual 7 is the iuel retarding member, located transverse oi the iurnace adjacent to and above the rear oi the grate. The fuel retarding member is preferably of cast metal and may be of oblong, as shown in the drawings, or any other convenient cross section, as desired. it preferably contains a continuous passage or Channel 8 for the circulation of water or other cooling medium through the same. I preier to construct said passage by casting the metal oi the body oi the iuel retarding member about a coil or length oi twyer pipooi bronze or other Said passage is preierably constructed without joints or unions, by this means suitable metal. oi a continuous length oi pipe, bent into the proper coils, as shown. 1 lind I can produce a satisfactory tlaw or imperiections caused by uneven contraction. Said iuel retarding member is pivoted in place in the tire chamber between the side walls in the following manner. At one extremity, as toward the leit in Fig. 2, the incl retarding member is provided, adjacent to the top, with a trunnion J, preicrably east integral with the incl retarding member, which trunnion is adapted to be journaled in the aperture ."J oi the journal block it which is built into the side wall 2 of the furnace. At the other extremity member is a similar trunnion 12 which extends through ape rture l3 in the other side wall oi the iurnace and is journaled in the journal bloc 9" built into the wall oi said iurnace across said aperture.

The. outlet extremity oi passage 8, which i mark i l, is led through said trunnion l2 and provided at its outer extremity without the [urn-ace with a suitable flexible water connection 15, preferably detachable. The inlet extremity oi passage 8, marked it is preferably at the lowest portion oi the incl retarding member and extends out through aperture 13 in the furnace wall and is there provided with a Ilcxible, detachable, water connection 17 through which water may be supplied thereto. lt will thus be seen that the iuel retarding member is swung between the side walls of the iurnace bymeans oi its trunnions 9 anditZ. The trunnion i2 is preferably extended somewhat outside the side wall 2 and provided at its extremity with an upwardly extending arm is, to the upper extremity oi which arm is pivoted operating lever 19, which lever extends along the side wall oi the iurnace to the iront thereoi where it provided with a hand grasp 20.

It is evident that when lever 19 is drawn iorward into the position shown in dotted lines in Fig. l, the arm 18 would also be drawn forward and the trunnion rigid therewith would turn accordingly swinging the casting without oi the incl retarding fuel retarding member.7 into the position shown in dotted lines in said figure, and, also, if the lever be pushed to the left of its position in full lines in said figure, the fuel retarding member would be tilted forward accordingly.

21 is a metal loop or keep, attached tothe furnace wall, serving tosupport the free r nd of let er 19. i 22 is a lug or projection on lever. 19 adapted to engage the keep 21 and lock the'lever and fuel retarding member in its normal position against being pushed aside by the pressure of fuel on the fuel retardingrmember. ltis eVident that by providingadditional lugs 22 -22 at suitable intervals, not shown, thefuel retarding lines in Fig. l, which communicate with the chamber 25 in the wall 5 whence it is admitted to air chambers in the side walls, not shown, and drawn thence through ports 26-26 into the fire chamber heated state. This method of heating such cold air is described and set forth in United States Letters Patent No. 773,148, issued to me October 25th, 1904.

The operation of my fuel retarding member is as follows:-Assuming that it is in its lowered position shown in solid lines in l and that a current of water or other cooling medium is being passed in through inlet 16, into passage 8 and out outlet 14, it is evident that the fuel on grate 3 will be retarded at the rear until it is thoroughly consumed, while the asheswill passunder the fuel retarding member and be deposited in the ash pit. In case clinkers collect against the, fuel retarding member or it is desired to clean the fire, the lever. 19 is pulled forward, thus tilting the fuel retarding member rearwardly and allowing theclinlrers or other material to pass unobstructed into the ash pit. lfit be desired to crush the clinkers the fuel retarding member may be repeatedly and rapidly raised and lowered by means of the lever 19, thus hammeringthe 'clinkers into small piecesv By engaging the proper lug 22 or 22, any desired elevation above the grate may be obtained. The passage of water through my fuel retarding member enables the same to be properly cooled and prevents its destruction from the heat,

It will be seen that the aperture is practically semi-circular, to permit the arc of movement ofthe pipe 16. To cover said aperture and prevent the amass passage is presented to the hottest "part of the fuel retarding member, that next to the fire, and also the water becoming heated, rises naturally in the fuel retarding member.

- In Fig. 7 I show a fuel'retarding member whose inlet about outlet 14 which is led therethrough to the outside of the furnace.

Ifv desired the aperture 13 may be of sufficient size to permit the withdrawal of the fuel retarding member therethrough when desired, or the same may be bricked up to the size required in operation and the brick work taken down when the removal of the fuel retarding member is desired. Where a battery of more than one boiler is in use and it is inconvenient to extend :trunnion 12 with its arm 18 and lever 19 without the side wall in the open air, I may make the side wall duplex,

having a chamber therein extending to the front ofthe furnace, in which the water connections may be led into-attachment with inlet 16 and outlet l4 and the arm 18 and lever 19 could work.

In Figs. 12 and 13 I show my fuel retarding member adapted for vertical movement above the grate instead of swinging as above described. The construction of the fuel retarding member is internally practically the same as above described with the trunnions omitted,

the fuel retarding member, however being of somewhat greater length than the interior width ofthe furnace. One extremity, as the left in Fig. 13 is seated in recess 28 in the inner face of the side wall, said recess being of sufficient width toaccommodate the fuel retarding member and of a height sufficient to allow proper vertical movement of the same as hereafter explained. The other extremity of the fuel retarding member is seated in the aperture 29, extending through thrside wall and of corresponding width and height as r cess 28. Through said aperture 20 are led in the Water connections similar to those described in connection with Figs. .1 and 2. 30-30 are shoes, preferably, integral with the lower surface of fuel retarding member 7 adjacent to the extremities thereof and engaged by the upper ends of rods 3l-31 which are located in vertical passages S2-32 in the side walls of the furnace. 83-33, 7 one only being shown, are arms having at their free ends suitable seats for the lower extremities of rodsinrush of cold air through the same, I prefer to provide 31--3l and rigidly attached to rock shaft 34 wh ch a metal plate or apron, 27, preferably rigidly, attached to trunnion 12 and of proper shape to effectually close the outer end of said aperture in all positions. A second apron, not shown, of similar design and arrangement, may, if desired, be provided for the inner end of said aperture for additional protection and to prevent the aperture being clogged by fuel or ashcs.

traverses the ash pit of the furnace and is journalcd at 12f its ends in journal blocks 35-3:' built into the walls of the furnace, one only of which is shown in Fig. 13. 36 is an arm rigidly attached to rock shaft 34 and whose upper, free extremity is pivoted to connecting rod 37 which rod extends through the front of the ash pit and is pivl2! oted at its outer end to arm or lever 38 which in turn I prefer to admit the Current of water or other cool- I is pivoted at its lower end to sector frame 39. p 40 is a ing medium adjacent to the bottom of the fuel retaidi pawl of any usual ing member and remove it from adjacent to the topthereof, as by that means the cooler portion of the sired member.

design, pivoted to lever 38 and adapted to engage jlio sector teeth 4l-41 of any le In case of a single boiler where 75 42 is handle removably attachable 13= retarding, member 7.

by the fuel retarding member and closing aperture I benefit.

the blocking the aperture with ashes or fuel to lever 38 to operate the same and removable so as to be taken off when not in use to prevent interfering with access to the fire chamber and ash pit. The normal position of this form of fuel retarding member is that shown in Figs. 12 and 13 where the fuel retarding member is seated on the bottom of recess 28 and aperture 29 at a distance above the grate suiiicient to permit the ashes to escape thereunder. When it isdcsired to raise the fuel retarding member to any desired elevation above the grate, the lever 38 is drawn forward toward the right in Fig. 12, thus drawing forward arm so, rocking shaft 34 and with it raising the free ends of arms 33-33, thus raising rods 31-31 and with them the fuel When the fuel retarding memher is raised to the desired degree, it may be locked in place by means of the pawl 40 engaging the proper teeth 41 on the sector. 43 is an apron or plate carried 29 of'cold air from the outside and A similar apron, not shown, may be carried by the fuel retarding member to close the recess 38 to keep the same from being blc cked with ashes or not For the sake of clearness I have illustrated my fuel retarding member as applied to use in connection with a traveling chain grate but it is evident that n to prevent the inrush any form of grate wherein the fuel moves from one point to another, my fuel retarding member will be great As for instance with a itoone y stokcr or grate wherein the grate is inclined from front to rear and the fuel gradually works down the inclined surface. fin such case my fuel retarding member would be lot-riled at the rear or lower end of the grate and el'fectual'ly rctard the fuel and effect complete combustion.

I may omit the passagcsfor water or other cooling liquid, if desired, thus making saving in construction but I find that such construction burns out readily and that the water cooled type is much more economical in the end. i may also do away with the twycr pipe channels in the castinghaving the channels simply cast in the metal of the fuel retarding member, or again, i may simply provide a hollow casting to contain a body of water kept cool by constant circulation from without. I

It is evident from the above description, that my invention performs new and beneficial improvements in fuel combustion, enbling more complete combustion to be effected and therefore doing away with waste of fuel and the production of smoke.

Other means from those shown may be substituted for rendering the fuel retarding member movable which will be within the scope of my invention but I regard the methods described as the most satisfactory.

Although for the sakeof clcarness, I have minutely described my invention as illustrated in the accompanying drawings, 1 do not wish to limit myself thereby but claim broadly:

the fuel is caused to travel the combination of u fuel 1. in a furnace in which within the combustion chamber, support, a fuel retarding (luVll'it, menus for adjustin said retarding device, to vary the distant-c between it and said fuel support and for scouring it in its. adjusted position.

2. ln a furnace in which the fuel is caused to travel w thin the combustion cluunbcr, the combination of u'i'uel support, a hollow fuel rctnrding dovlcc, menus for circulatin zi. cooling agent through said retarding device, means the fuel on said fuel support, for

for adjusting said retarding device, to vary the distance between it and said fuel support, and for securing it in its adjusted position.

3. in a furnace in which the fuel is caused to travel within the combustion chamber, the combination of a fuel support, a hollow fuel retarding device provided with journals arranged at one side of its axial line, means for circulating a cooling urgent through said retarding device, said cooling agent being introduced through one of said journals, and means for adjusting said retarding device, to vary the distance between it and said fuel support, and for securing it in its adjusted position.

4. 1n a furnace in which the fuel is caused to travel within the combustion chamber, a fuel support, a fuel retarding device having; its extremities supported from the side walls of said furnace, means for adjusting said fuel retarding device to vary the interval between the lower surface of the same and said fuel support and means for securing the fuel retarding device in its adjusted position.

5. In a furnace in which the fuel is caused to travel, a fuetsupport, an adjustable fuel-retarding member located above said support, means for adjusting said member relulive to said fuel-support, and means for locking the some in the desired position,

.6. in a furnace in which the fuel is caused to travel within the combustion chombcr, a fuel support, a fuel retarding member mounted above and adjacent to the rear of said fuel support, trunnions at the extremities of said member joui-nulcd in lhc walls of said furnace, means for locking said member in its operative position and men-us for varying the interval between said member and said fuel support.

7. in a furnace in which the fuel is caused to travel within the combustion chamber, the combination of a fuel support, a fuel retarding member supported, when in its operative position, at an interval above said fuel support, means for securing said member in its operative position and means for adjusting said member to vary the interval between the some and said fuel support.

8. In u furnace in which the fuel is caused to travel within the combustion chamber, the combination of a fuel support, an udjnstable fuel retarding member supported above said fuel support and independently thereof, means for adjusting the position of said member relative to said fuel support and menus for securing said member in the desired position. i

9. in a furnace in which the fuel is caused to travel within the'combustlon chamber during combustion, the comhlnrftson of a fuel support, a membcr' p lvotnlly su'p ported .il'ove said fuel support and independently thereof. and adapted to unyieidlngly retard the travel of the fuel on said fuel support and means for varying the distance between said member and said fuel support, for the purposes described.v

1c. in a furnace in which the fuel is caused to travel within the combustion chamber during combustion, a fuel support and a pivoted member supported at an interval above said fuel support and tar-d the travel of the fuel on said fuel support, for the purposes described.

11. In a furnace in within the combustion chamber during, combustion, combination of a fuel support, and a member pivotully supportedby its extremities at an interval above said fuel support and adapted to uuyieldingly retard the travel of the purposes described.

v 12. in n. furnace in which the fuel is caused to travel within the combustion chamber during combustion, a fuel support, and a member plvotully supported by its exlreml- (has from the sidc walls of the furnace at an interval above id tuel support and adapted to unyleldlngly'retard the travel or the fuel on said fuel support, for the purposes described. A

is. in a furnace lnwhlch the fuel is caused to travel within the combustion chamber during combustion, a fuel support and a water cooled fuel retarding member having ti-unnlons whereby said member is plvotally supported at an interval above said fuel support, one of said trunnlons being hollow to form a water passage communicating with the interior oi said member, for the purposedescrlbed.

adapted to unyieldingly ro the e p I 870,968

fuel support and adapted to unyieldingly retard the travel of the fuel on said fuel support and means for maintaining a current of water through said member, for the purposes i described. I r In a lurnace in which the fuel 'is caused to travel within the combustion chamber during combustion, a fuel I support, a water cooled member provided with trunnlons whereby it is supported at an interval above said fuel support and adapted to unyielding'ly retard the travel of the fuel on said fuel support. and means for passing; a current i of Water /through said trunnions, for the purposes described,

16. In a furnace in which the fuel is caused to travel withi'n'the combustion chamberduring combustion, a fuel support and a water cooled fuel retarding member having an interval above said fuel support, said member being provided with water channels from bottom to top thereof,

for the purpose described. V

Signed at l'ittsburg la. this 28th day of January 1905.

GEORGE Ll JUNGE. Witnesses:

EDWARD A. LAWRENCE, A. M. KoNsmNzmQ, 

